时间:2021-07-01 10:21:17 帮助过:47人阅读
近日在之前项目修改接口,使用resutful,使用delete方法传参后台一直接收不到,查阅相关资料发现,springmvc对于delete方法不支持,需要在web.xml新增过滤器
<filter> <!--该过滤器用于处理post请求转换为标准的delete与put请求 --> <filter-name>HiddenHttpMethodFilter</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>HiddenHttpMethodFilter</filter-name> <!--servlet为springMvc的servlet名 --> <servlet-name>springMVC</servlet-name> </filter-mapping>
相关解释为springmvc不支持put,delete请求传参,过滤器的核心代码如下
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException { String paramValue = request.getParameter(this.methodParam); if ("POST".equals(request.getMethod()) && StringUtils.hasLength(paramValue)) { String method = paramValue.toUpperCase(Locale.ENGLISH); HttpServletRequest wrapper = new HttpMethodRequestWrapper(request, method); filterChain.doFilter(wrapper, response); } else { filterChain.doFilter(request, response); } }
将post方法转换为标准的put或者delete方法
相应的前端访问的请求改为
$.ajax({ type : "POST", url : "demo", dataType : "json", async : false, data : { provinceIds : id, //该参数指定后台接受方法类型,put/delete _method : "delete", }, success : function(data) { });
后台方法
@RequestMapping(value = "/demo",method = RequestMethod.DELETE) @ResponseBody public Map demo(HttpServletRequest request, HttpServletResponse response,Integer id){ return null; }
需要注意的是,只有context-type:application/x-www-form-urlencoded的请求才会被过滤。
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